我的最终目标是让 chemfig 与安基SRS。它仅接受 .png 作为 latex 输出，因此我需要使用 pdflatex 进行编译，然后在 latex 环境中转换文件。我为此使用了 Imagemagick 和 standalone。
如果我编译以下代码
\documentclass[convert={convertexe={convert}}]{standalone}
\special{papersize=3in,5in}
\usepackage[utf8]{inputenc}
\usepackage{chemfig}
\pagestyle{empty}
\begin{document}
\chemfig{A=B}
\end{document}
从命令行使用pdflatex test -shell-escape，编译器产生以下错误（有关详细信息，请参阅附件）：
(test.aux
! Undefined control sequence.
l.2 \pgfsyspdfmark
{pgfid1}{245759}{1}
?
! LaTeX Error: Missing \begin{document}.
看起来是什么问题？
尽管输出 .png 确实已创建并且看起来正确，但 AnkiSRS 编译器会因错误而停止，所以我需要弄清楚。
我在 Win7 64 位上运行，从路径中没有空格的位置进行编译。没有辅助 latex 文件。
旁注：我知道那convert是 Windows 系统命令，但是当我将 Imagemagick 的转换程序重命名为 imgconvert 时，它会抛出错误，提示转换已过时，并且不起作用（即使它在系统路径中）。
测试.aux：
\relax
\pgfsyspdfmark {pgfid1}{245759}{1}
\gdef \sa@multi@numpages {0}
测试日志：
This is pdfTeX, Version 3.14159265-2.6-1.40.17 (MiKTeX 2.9 64-bit) (preloaded format=pdflatex 2016.7.14) 18 JUL 2016 22:25
entering extended mode
**./test.tex
(test.tex
LaTeX2e <2016/03/31> patch level 2
Babel <3.9r> and hyphenation patterns for 75 language(s) loaded.
("C:\Program Files\MiKTeX 2.9\tex\latex\standalone\standalone.cls"
Document Class: standalone 2015/07/15 v1.2 Class to compile TeX sub-files stand
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Package: ifluatex 2016/05/16 v1.4 Provides the ifluatex switch (HO)
Package ifluatex Info: LuaTeX not detected.
)
("C:\Program Files\MiKTeX 2.9\tex\generic\oberdiek\ifpdf.sty"
Package: ifpdf 2016/05/14 v3.1 Provides the ifpdf switch
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("C:\Program Files\MiKTeX 2.9\tex\generic\ifxetex\ifxetex.sty"
Package: ifxetex 2010/09/12 v0.6 Provides ifxetex conditional
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("C:\Program Files\MiKTeX 2.9\tex\latex\xkeyval\xkeyval.sty"
Package: xkeyval 2014/12/03 v2.7a package option processing (HA)
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("C:\Program Files\MiKTeX 2.9\tex\generic\xkeyval\xkvutils.tex"
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\c@sapage=\count81
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File: standalone.cfg 2015/07/15 v1.2 Default configuration file for 'standalone
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Document Class: article 2014/09/29 v1.4h Standard LaTeX document class
("C:\Program Files\MiKTeX 2.9\tex\latex\base\size10.clo"
File: size10.clo 2014/09/29 v1.4h Standard LaTeX file (size option)
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\c@section=\count83
\c@subsection=\count84
\c@subsubsection=\count85
\c@paragraph=\count86
\c@subparagraph=\count87
\c@figure=\count88
\c@table=\count89
\abovecaptionskip=\skip41
\belowcaptionskip=\skip42
\bibindent=\dimen102
)
\sa@box=\box26
runsystem(pdflatex -shell-escape -jobname "test" "\expandafter\def\csname sa@
internal@run\endcsname{1}\input{test}")...executed.
(test.aux
! Undefined control sequence.
l.2 \pgfsyspdfmark
{pgfid1}{245759}{1}
?
! LaTeX Error: Missing \begin{document}.
See the LaTeX manual or LaTeX Companion for explanation.
Type H <return> for immediate help.
...
l.2 \pgfsyspdfmark {p
gfid1}{245759}{1}
? H
You're in trouble here. Try typing <return> to proceed.
If that doesn't work, type X <return> to quit.
?
)
runsystem(convert -density 300 test.pdf -quality 90 test.png)...executed.
Class standalone:
Output written on test.png.
[1
{C:/ProgramData/MiKTeX/2.9/pdftex/config/pdftex.map}] ) )
Here is how much of TeX's memory you used:
696 strings out of 493334
10696 string characters out of 3139246
62614 words of memory out of 3000000
4282 multiletter control sequences out of 15000+200000
3640 words of font info for 14 fonts, out of 3000000 for 9000
1141 hyphenation exceptions out of 8191
34i,4n,56p,206b,106s stack positions out of 5000i,500n,10000p,200000b,50000s
<C:/Program Files/MiKT
eX 2.9/fonts/type1/public/amsfonts/cm/cmr10.pfb>
Output written on test.pdf (1 page, 12628 bytes).
PDF statistics:
10 PDF objects out of 1000 (max. 8388607)
0 named destinations out of 1000 (max. 500000)
1 words of extra memory for PDF output out of 10000 (max. 10000000)
defining Unicode char U+00CF (decimal 207)
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defining Unicode char U+2423 (decimal 9251)
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... processing UTF-8 mapping file for font encoding OT1
("C:\Program Files\MiKTeX 2.9\tex\latex\base\ot1enc.dfu"
File: ot1enc.dfu 2016/02/28 v1.1s UTF-8 support for inputenc
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defining Unicode char U+2013 (decimal 8211)
defining Unicode char U+2014 (decimal 8212)
defining Unicode char U+2018 (decimal 8216)
defining Unicode char U+2019 (decimal 8217)
defining Unicode char U+201C (decimal 8220)
defining Unicode char U+201D (decimal 8221)
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File: omsenc.dfu 2016/02/28 v1.1s UTF-8 support for inputenc
defining Unicode char U+00A7 (decimal 167)
defining Unicode char U+00B6 (decimal 182)
defining Unicode char U+00B7 (decimal 183)
defining Unicode char U+2020 (decimal 8224)
defining Unicode char U+2021 (decimal 8225)
defining Unicode char U+2022 (decimal 8226)
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Now handling font encoding OMX ...
... no UTF-8 mapping file for font encoding OMX
Now handling font encoding U ...
... no UTF-8 mapping file for font encoding U
defining Unicode char U+00A9 (decimal 169)
defining Unicode char U+00AA (decimal 170)
defining Unicode char U+00AE (decimal 174)
defining Unicode char U+00BA (decimal 186)
defining Unicode char U+02C6 (decimal 710)
defining Unicode char U+02DC (decimal 732)
defining Unicode char U+200C (decimal 8204)
defining Unicode char U+2026 (decimal 8230)
defining Unicode char U+2122 (decimal 8482)
defining Unicode char U+2423 (decimal 9251)
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("C:\Program Files\MiKTeX 2.9\tex\generic\chemfig\chemfig.tex"
("C:\Program Files\MiKTeX 2.9\tex\generic\pgf\libraries\pgflibraryarrows.meta.c
ode.tex"
File: pgflibraryarrows.meta.code.tex 2015/05/13 v3.0.1a (rcs-revision 1.13)
\pgfarrowinset=\dimen151
\pgfarrowlength=\dimen152
\pgfarrowwidth=\dimen153
\pgfarrowlinewidth=\dimen154
)
\CF@cnt@atomingroup=\count110
\CF@cnt@groupnumber=\count111
\CF@cnt@atomnumber=\count112
\CF@cnt@cycle=\count113
\CF@dim=\dimen155
\CF@lewis@box=\box38
\CF@box@boxa=\box39
\CF@box@boxb=\box40
\CF@stuff@box=\box41
\CF@unused=\write4
\CF@compound@cnt=\count114
\CF@arrow@size=\dimen156
)
Package: chemfig 2015/12/01 v1.2d Draw molecule with an easy syntax
)
No file test.aux.
\openout1 = `test.aux'.
LaTeX Font Info: Checking defaults for OML/cmm/m/it on input line 6.
LaTeX Font Info: ... okay on input line 6.
LaTeX Font Info: Checking defaults for T1/cmr/m/n on input line 6.
LaTeX Font Info: ... okay on input line 6.
LaTeX Font Info: Checking defaults for OT1/cmr/m/n on input line 6.
LaTeX Font Info: ... okay on input line 6.
LaTeX Font Info: Checking defaults for OMS/cmsy/m/n on input line 6.
LaTeX Font Info: ... okay on input line 6.
LaTeX Font Info: Checking defaults for OMX/cmex/m/n on input line 6.
LaTeX Font Info: ... okay on input line 6.
LaTeX Font Info: Checking defaults for U/cmr/m/n on input line 6.
LaTeX Font Info: ... okay on input line 6.
ABD: EveryShipout initializing macros
("C:\Program Files\MiKTeX 2.9\tex\context\base\supp-pdf.mkii"
[Loading MPS to PDF converter (version 2006.09.02).]
\scratchcounter=\count115
\scratchdimen=\dimen157
\scratchbox=\box42
\nofMPsegments=\count116
\nofMParguments=\count117
\everyMPshowfont=\toks30
\MPscratchCnt=\count118
\MPscratchDim=\dimen158
\MPnumerator=\count119
\makeMPintoPDFobject=\count120
\everyMPtoPDFconversion=\toks31
) ("C:\Program Files\MiKTeX 2.9\tex\generic\oberdiek\pdftexcmds.sty"
Package: pdftexcmds 2016/05/21 v0.22 Utility functions of pdfTeX for LuaTeX (HO
)
Package pdftexcmds Info: LuaTeX not detected.
Package pdftexcmds Info: \pdf@primitive is available.
Package pdftexcmds Info: \pdf@ifprimitive is available.
Package pdftexcmds Info: \pdfdraftmode found.
)
("C:\Program Files\MiKTeX 2.9\tex\latex\oberdiek\epstopdf-base.sty"
Package: epstopdf-base 2016/05/15 v2.6 Base part for package epstopdf
("C:\Program Files\MiKTeX 2.9\tex\latex\oberdiek\grfext.sty"
Package: grfext 2016/05/16 v1.2 Manage graphics extensions (HO)
("C:\Program Files\MiKTeX 2.9\tex\generic\oberdiek\kvdefinekeys.sty"
Package: kvdefinekeys 2016/05/16 v1.4 Define keys (HO)
))
("C:\Program Files\MiKTeX 2.9\tex\latex\oberdiek\kvoptions.sty"
Package: kvoptions 2016/05/16 v3.12 Key value format for package options (HO)
("C:\Program Files\MiKTeX 2.9\tex\generic\oberdiek\kvsetkeys.sty"
Package: kvsetkeys 2016/05/16 v1.17 Key value parser (HO)
("C:\Program Files\MiKTeX 2.9\tex\generic\oberdiek\etexcmds.sty"
Package: etexcmds 2016/05/16 v1.6 Avoid name clashes with e-TeX commands (HO)
Package etexcmds Info: Could not find \expanded.
(etexcmds) That can mean that you are not using pdfTeX 1.50 or
(etexcmds) that some package has redefined \expanded.
(etexcmds) In the latter case, load this package earlier.
)))
Package epstopdf-base Info: Redefining graphics rule for `.eps' on input line 4
38.
Package grfext Info: Graphics extension search list:
(grfext) [.png,.pdf,.jpg,.mps,.jpeg,.jbig2,.jb2,.PNG,.PDF,.JPG,.JPE
G,.JBIG2,.JB2,.eps]
(grfext) \AppendGraphicsExtensions on input line 456.
)
LaTeX Font Info: External font `cmex10' loaded for size
(Font) <7> on input line 7.
LaTeX Font Info: External font `cmex10' loaded for size
(Font) <5> on input line 7.
[1
Non-PDF special ignored!{C:/ProgramData/MiKTeX/2.9/pdftex/config/pdftex.map}]
(test.aux)
LaTeX Warning: Label(s) may have changed. Rerun to get cross-references right.
)
Here is how much of TeX's memory you used:
12963 strings out of 493334
259388 string characters out of 3139246
303332 words of memory out of 3000000
16267 multiletter control sequences out of 15000+200000
3640 words of font info for 14 fonts, out of 3000000 for 9000
1141 hyphenation exceptions out of 8191
63i,9n,85p,478b,602s stack positions out of 5000i,500n,10000p,200000b,50000s
<C:/Program Files/MiKTeX 2.9/fonts/type1/public/amsfonts/cm/cmr10.pfb>
Output written on test.pdf (1 page, 9968 bytes).
PDF statistics:
13 PDF objects out of 1000 (max. 8388607)
0 named destinations out of 1000 (max. 500000)
13 words of extra memory for PDF output out of 10000 (max. 10000000)
答案1
这是转换工作方式的问题。该文件实际上被编译了两次，但其中一次基本上没有任何包，因此aux在此阶段读取该文件时，命令未定义。
解决方法：
\providecommand{\pgfsyspdfmark}[3]{}
\documentclass[convert={convertexe={convert}}]{standalone}
\usepackage[utf8]{inputenc}
\usepackage{chemfig}
\pagestyle{empty}
\begin{document}
\chemfig{A=B}
\end{document}
我删除了\special似乎只会产生警告的那个。